The Great Furnace

The Great Furnace was the largest furnace in Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years., the crafting district of Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.. It served as the principal heat source for the district's heaviest forging work and, in the period preceding the Great CataclysmThe Great CataclysmThe day Makuta Teridax put the Great Spirit to sleep, the Great Spirit Robot fell from the sky, Metru Nui flooded, and Voya Nui tore loose from the Southern Continent., became the site at which the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. confronted and destroyed the MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. King Root. The fused Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi. recovered from that battle later formed the Kanohi VahiKanohi VahiThe Kanohi Vahi was the Legendary Mask of Time, forged by Toa Metru Vakama from the six fused Great Disks of Metru Nui during the city's evacuation., the Legendary Mask of TimeMask of TimeThe Kanohi Vahi is the Matoran Universe's deadliest mask, capable of stopping or accelerating time, and its creation nearly tore Metru Nui apart..

Function within Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years.#

The Great Furnace stood within the crafting sector of Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years., the district responsible for the production of KanohiKanohiMasks that grant powers and sustain life, they're the most vital artifact in the Matoran Universe., KanokaKanoka DisksMetru Nui's most versatile artifact: flying disks equally at home in sport, combat, and crafting. disks, tools, and structural components for the rest of Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.. Smaller forges such as Vakama's ForgeVakama's ForgeA Ta-Metru workshop where Vakama crafted Kanohi, failed to forge the Vahi, and received the Toa Stone from Lhikan. handled mask-making and individual craft work, but heavy metallurgy and the highest-temperature smelting drew on the Great Furnace itself. Its size and output placed it at the centre of the district's industrial economy.

The internal temperature of the Furnace exceeded the safe working range for MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. over any sustained period. Workers entered for short shifts and withdrew, with rotation managed by the district's foremen. The structure's main chamber held a continuous lava reservoir that drove the working heat, and the surrounding corridors funnelled the flow of heat outward toward the secondary forges. The arrangement allowed Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years. to maintain large-scale production without exposing individual MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. workers to prolonged heat damage.

The Furnace also supported a small population of Furnace Salamanders, RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. adapted to extreme heat that lived in the cracks and shafts of the structure alongside HikakiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts.. The Salamanders shared their habitat with the Furnace's mechanical workings and were rarely seen by the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. workers. Their presence depended on the continued operation of the Furnace and the network of vents that fed it.

The MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. infestation#

The MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. was a sentient plant created and dispatched by MakutaMakutaA glossary entry distinguishing the three referents of the word Makuta: the species, the individual Teridax, and the title held by every Brotherhood member. TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna. as part of the broader plan to depopulate Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. and force the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. into the ColiseumThe ColiseumCentral tower of Metru Nui, serving as government seat, sporting arena, and, during Teridax's masquerade, a prison for the city's Matoran population.. Its King Root, the central organism that controlled the dispersed vines and seedlings spread across the city, was planted in the Great Furnace itself. The lava and constant heat that made the Furnace unworkable for MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. provided the King Root with the conditions it needed to grow at an accelerated rate.

From its position within the Furnace, the King Root extended vines outward through Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years. and across the wider city. The attacks escalated over an extended period, with the VahkiVahkiMetru Nui's mechanical law enforcement squads, designed to maintain rigid order but ultimately undermined by chaos beyond their programming. order-keepers unable to contain the spread. MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. were driven from their districts toward the city centre by the combined pressure of the vines, the seedlings dispersed by the parent organism, and the Furnace Salamanders forced out of their habitat by the King Root's growth. The destination of the displacement, the ColiseumThe ColiseumCentral tower of Metru Nui, serving as government seat, sporting arena, and, during Teridax's masquerade, a prison for the city's Matoran population., matched the Brotherhood of MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate.'s operational requirement to gather the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. in a single location.

The Furnace had been compromised long before the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. understood the source of the attacks. The presence of the King Root sabotaged the structure's ordinary function as a forging facility, and the lava that had previously served Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years.'s industry became the medium through which the plant extended its hold on the city.

Recovery of the Great Disks#

The defeat of the MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. depended on the recovery of the six Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi., one hidden in each metru and known to a single MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. within each district. VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. and the other Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. tracked down NuhriiNuhriiNuhrii was a Ta-Matoran mask-maker of Metru Nui, one of the six finders of a Great Disk, who later served in the Ta-Koro Guard on Mata Nui. of Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years., VhisolaVhisolaVhisola was a Ga-Matoran student of Nokama, one of the six finders of a Great Disk, whose research deduced the location of the Morbuzakh King Root. of Ga-MetruGa-MetruGa-Metru is a district of Metru Nui, home to the Ga-Matoran and the Bordakh., OrkahmOrkahmOrkahm was a Le-Matoran Ussal rider of Le-Metru, Matau's chief rival, one of the six finders of a Great Disk, and later a Gukko Force member on Mata Nui. of Le-MetruLe-MetruThe teal district where Le-Matoran managed everything that moved through Metru Nui, from chutes to airships., TehuttiTehuttiTehutti was an Onu-Matoran archivist of Metru Nui, one of the six finders of a Great Disk, whose Archives research produced the Matoran Nui technique. of Onu-MetruOnu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui., EhryeEhryeEhrye was a Ko-Matoran errand-runner of the Knowledge Towers, one of the six finders of a Great Disk, and a survivor of every era from Metru Nui through Spherus Magna. of Ko-MetruKo-MetruKo-Metru was Metru Nui's frozen intellectual quarter, home to the scholarly Ko-Matoran race., and AhkmouAhkmouA Po-Matoran carver of Metru Nui, one of the six Great Disk holders, who collaborated with Makuta Teridax and later imposed false Turaga rule during Teridax's reign. of Po-MetruPo-MetruMetru Nui's Stone District, home to carvers whose work defined the city and site of an ancient conflict that threatened to divide it.. Each disk was extracted under increasingly difficult circumstances, with VahkiVahkiMetru Nui's mechanical law enforcement squads, designed to maintain rigid order but ultimately undermined by chaos beyond their programming. interference, civic obstruction under the false DumeDumeDume is a Turaga of Fire and the former ruler of Metru Nui, distinguished by his red and black coloring and the Noble Kanohi Kiril, the Mask of Regeneration. As a member of the Turaga of Metru Nui, he wields a Staff of Office and commands a weakened mastery of Fire. He later resides on the reformed Spherus Magna., and the MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear.'s own attacks compounding the search.

Research conducted by VhisolaVhisolaVhisola was a Ga-Matoran student of Nokama, one of the six finders of a Great Disk, whose research deduced the location of the Morbuzakh King Root. identified the King Root as the source of the infestation and the only target whose destruction would end the threat. The location was deduced from the same body of research and from the conditions required for the plant's growth. NokamaNokamaNokama served as Toa Metru of Water, endured the Hordika mutation, and led Ga-Koro and later Ga-Metru as Turaga through three eras., assessing the evidence with the other Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety., concluded that the King Root had to be situated within the Great Furnace itself.

The six Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. departed for Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years. with the six MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. disk-holders accompanying them. The party reached the Furnace district and began the approach to the main chamber, with the Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi. carried as the only known means of overcoming the King Root.

Battle in the Furnace#

The approach to the Great Furnace was contested at every stage. The Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. and the six MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. passed through an abandoned forge in which MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. seedlings rained down from the ceiling and sprouted on contact with the floor. The party narrowly escaped, with AhkmouAhkmouA Po-Matoran carver of Metru Nui, one of the six Great Disk holders, who collaborated with Makuta Teridax and later imposed false Turaga rule during Teridax's reign. attempting to flee during the panic and OnewaOnewaOnewa served as Toa Metru of Stone, led Po-Koro through the Dark Time, and constructed the Metru Nui statue honoring the fallen Toa Mahri Matoro. confirming his role as the traitor who had assisted the false DumeDumeDume is a Turaga of Fire and the former ruler of Metru Nui, distinguished by his red and black coloring and the Noble Kanohi Kiril, the Mask of Regeneration. As a member of the Turaga of Metru Nui, he wields a Staff of Office and commands a weakened mastery of Fire. He later resides on the reformed Spherus Magna. earlier in the crisis.

In the corridor leading to the Furnace, MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. vines blocked the way. NujuNujuNuju served as a Ko-Metru seer, Toa Metru of Ice, and Turaga of Ko-Koro who spoke only in bird calls translated by Matoro. expended much of his elemental power forcing a path through the ice required to disable the vines. As the party advanced, the King Root deployed a coordinated thorn attack, firing hundreds of projectiles at the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. at close range. The ToaThe Toa: Heroes of the Matoran UniverseThe Toa were biomechanical guardians sworn to protect the Matoran, bound by a strict code and defined by sacrifice across every age of the universe. were on the verge of being overrun.

The six MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. intervened directly. Drawing on a technique that TehuttiTehuttiTehutti was an Onu-Matoran archivist of Metru Nui, one of the six finders of a Great Disk, whose Archives research produced the Matoran Nui technique. had learned within the ArchivesThe Archives of Metru NuiThe Archives of Onu-Metru were the central repository of Matoran knowledge and Rahi specimens, maintained by the Archivist Corps beneath the city's surface., NuhriiNuhriiNuhrii was a Ta-Matoran mask-maker of Metru Nui, one of the six finders of a Great Disk, who later served in the Ta-Koro Guard on Mata Nui., VhisolaVhisolaVhisola was a Ga-Matoran student of Nokama, one of the six finders of a Great Disk, whose research deduced the location of the Morbuzakh King Root., OrkahmOrkahmOrkahm was a Le-Matoran Ussal rider of Le-Metru, Matau's chief rival, one of the six finders of a Great Disk, and later a Gukko Force member on Mata Nui., AhkmouAhkmouA Po-Matoran carver of Metru Nui, one of the six Great Disk holders, who collaborated with Makuta Teridax and later imposed false Turaga rule during Teridax's reign., TehuttiTehuttiTehutti was an Onu-Matoran archivist of Metru Nui, one of the six finders of a Great Disk, whose Archives research produced the Matoran Nui technique., and EhryeEhryeEhrye was a Ko-Matoran errand-runner of the Knowledge Towers, one of the six finders of a Great Disk, and a survivor of every era from Metru Nui through Spherus Magna. merged into a MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. Nui, a single combined being formed from the fusion of six MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body.. The Nui broke the assault and cleared the path into the main chamber of the Great Furnace. After delivering the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. into the central space, the six MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. separated and withdrew from the building.

Inside the main chamber, the King Root stood as tall as a skyscraper and filled the room. It addressed the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. telepathically, stating that it had been commanded to drive the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. population to the centre of the city and confirming that the ColiseumThe ColiseumCentral tower of Metru Nui, serving as government seat, sporting arena, and, during Teridax's masquerade, a prison for the city's Matoran population. was the intended destination. The Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. deployed the six Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi. against the central organism and destroyed it. The chamber and the surrounding structure sustained heavy damage during the battle, with sections of the Furnace collapsing as the King Root died and the Toa retreated.

Creation of the Disk of Time#

The destruction of the King Root left the six Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi. recovered and intact within the ruined chamber. VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. merged the six disks together, producing a single fused disk that was later catalogued as the Disk of Time. The merging combined the unique properties of the Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years., Ga-MetruGa-MetruGa-Metru is a district of Metru Nui, home to the Ga-Matoran and the Bordakh., Le-MetruLe-MetruThe teal district where Le-Matoran managed everything that moved through Metru Nui, from chutes to airships., Onu-MetruOnu-MetruThe deep archive-city that made mining and historical records preservation the beating heart of Metru Nui., Ko-MetruKo-MetruKo-Metru was Metru Nui's frozen intellectual quarter, home to the scholarly Ko-Matoran race., and Po-MetruPo-MetruMetru Nui's Stone District, home to carvers whose work defined the city and site of an ancient conflict that threatened to divide it. disks into one artifact whose power was unlike any of its constituents.

VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. did not carve the Kanohi VahiKanohi VahiThe Kanohi Vahi was the Legendary Mask of Time, forged by Toa Metru Vakama from the six fused Great Disks of Metru Nui during the city's evacuation. from the Disk of Time at the Furnace itself. The carving occurred later, after the Toa had withdrawn from Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. during the evacuation that followed TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna.'s coup, with VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. completing the work aboard the transporter as the surviving population travelled away from the city. The finished mask was used briefly against TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna. before being lost into the silver sea, where VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. later retrieved it during his return to recover the artifact alone.

The chain of events that produced the Kanohi VahiKanohi VahiThe Kanohi Vahi was the Legendary Mask of Time, forged by Toa Metru Vakama from the six fused Great Disks of Metru Nui during the city's evacuation. began in the Great Furnace. Without the destruction of the King Root and the recovery of the six Great DisksThe Great DisksThe six legendary Kanoka of Metru Nui, one hidden in each district, recovered by the Toa Metru during the Morbuzakh crisis and later fused into the Kanohi Vahi. from the same chamber, the merging that yielded the Disk of Time would not have occurred, and the Legendary Mask of TimeMask of TimeThe Kanohi Vahi is the Matoran Universe's deadliest mask, capable of stopping or accelerating time, and its creation nearly tore Metru Nui apart. would not have entered the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control.'s record. The Furnace therefore held a place in the history of the Vahi that no other site occupied.

Damage and restoration#

The battle with the King Root left the Great Furnace structurally compromised. The main chamber sustained collapse damage, the surrounding corridors filled with debris from the dying plant, and the lava reservoir that had supported both the Furnace's industrial function and the King Root's growth was disrupted. The Furnace was effectively out of operation by the time the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety. and the six MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. escaped the building.

The Great CataclysmThe Great CataclysmThe day Makuta Teridax put the Great Spirit to sleep, the Great Spirit Robot fell from the sky, Metru Nui flooded, and Voya Nui tore loose from the Southern Continent. followed shortly afterward and added further damage to the structure, alongside the wider destruction inflicted across Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.. When the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. population was eventually returned to the city after the VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe. occupation and the rebuilding of Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive., the Great Furnace remained among the structures listed for repair. The Staff of ArtakhaThe Staff of ArtakhaA restoration artifact forged by Artakha himself, used by Helryx to reverse the environmental damage of the Great Cataclysm., used to restore the city after the recovery of the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body., rebuilt the Furnace to its prior state. The lava reservoir was restored, the main chamber returned to its operational form, and the structure resumed its place within the Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years. industrial network.

The Furnace Salamanders did not return to the rebuilt Furnace. Their habitat had been altered by the King Root and the subsequent battle, and the surviving population had relocated to volcanic vents elsewhere in the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control.. The Furnace continued to operate as a heavy-forge facility for the remainder of Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.'s habitation, supporting the same district functions it had served before the MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear. crisis.

Later events and abandonment#

VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. returned to the area beneath the Great Furnace during the events surrounding the Shadowed One's attempt to seize the Kanohi VahiKanohi VahiThe Kanohi Vahi was the Legendary Mask of Time, forged by Toa Metru Vakama from the six fused Great Disks of Metru Nui during the city's evacuation. from him. After the Shadowed One destroyed his jetpack and the Vahi changed hands in mid-flight, VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. crashed beneath the Furnace and encountered KarzahniKarzahniBionicle reused one cursed name three times, and every instance earns it, this is the article that finally untangles all three., who had reformed from the branches of the Lhikan IILhikan IIA desperate ship built from Vahki scraps and strange plant matter to rescue Matoran from Metru Nui before it fell. and survived in the chambers below the structure. The encounter produced information about a secret organisation and about the Toa MetruToa Metru and Toa HordikaSix Matoran elevated by Lhikan to save their city, mutated by Visorak venom, and restored in time to deliver the population to safety.'s broader destiny, which VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years. carried with him after escaping the area.

The Furnace continued to function until the final stages of the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control.'s existence. After the awakening of Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna. and the events of the Battle of Bara MagnaBara MagnaA desert world of tribal warfare and scarce resources, one of three landmasses that formed Spherus Magna., the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body., Toa, and other surviving inhabitants of the universe relocated to the reformed Spherus MagnaSpherus MagnaA desert world of ancient conflict that became the merger point of the Matoran Universe and Bionicle's true endpoint.. Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive. was abandoned, and the Great Furnace alongside it. No further industrial operations occurred within the building after the evacuation.

The Furnace's place in Ta-MetruTa-MetruThe fire district where Ta-Matoran perfected their craft and powered Metru Nui's industry for thousands of years. industry, in the defeat of the MorbuzakhMorbuzakhA sentient plant monster created by Teridax to terrorize Metru Nui and control its population through fear., and in the chain of events that produced the Kanohi VahiKanohi VahiThe Kanohi Vahi was the Legendary Mask of Time, forged by Toa Metru Vakama from the six fused Great Disks of Metru Nui during the city's evacuation. made it one of the most consequential structures in Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.'s history. Each of these roles ended permanently with the migration to Spherus MagnaSpherus MagnaA desert world of ancient conflict that became the merger point of the Matoran Universe and Bionicle's true endpoint., and the building was left empty alongside the rest of the city it had served.